I am getting the below for this domain. The bcamyview.com is not a valid domain so the error is correct. How can I whitelist either the domain or IP address for the senders domain. So far I have “fixed” it by adding the IP as a trusted network which is obviosuly not ideal but fine in the short term.
NOQUEUE: reject: RCPT from dcmailrelay.zellis.com[18.104.22.168]: 450 4.1.8 firstname.lastname@example.org: Sender address rejected: Domain not found; email@example.com firstname.lastname@example.org proto=ESMTP helo=<dcmailrelay.zellis.com>
Many Thanks in advance